var NB = {
	alert: function(content, okFunction) {
		layer.open({
		    content: content,
		    btn: ['我知道了'],
		    yes: okFunction
		});
	},
	prompt: function(title, content, okFunction, noFunction) {
		layer.open({
			title: title,
		    content: content,
		    btn: ['确认', '取消'],
		    yes: okFunction,
		    no: noFunction,
		});
	}
};